If you truly mean “cold” storage (not many or no transactions needed on your BTC) then it can be as simple as recording your 12 or 24 word “seed phrase” somewhere safe (S.D. box, “Bear Ball” buried in the back yard, etc.)...most suggest stainless steel as the medium to record your private key seed words (fire/rust proof vs. paper, etc.).
https://www.amazon.com/Billfodl-Private-Key-Backup/dp/B07BS632RR
“Bear Ball” cache: https://www.amazon.com/dp/B0002ZB5Y8
If easy BTC transaction ability is needed then a ColdCard (Bitcoin only), Ledger, Trezor, Blockstream Jade or similar is the way to go:
Etc: https://coindoo.com/best-crypto-cold-wallet/
Your 12 or 24 seed word phrase will restore your BTC to any wallet, cold or “online”/smartphone wallet later if needed.
I plan on putting it in cold storage and “hodling” it indefinitely.
What you said in the first part is probably exactly what I wanted to know.
I will have to study what you sent me. I may ask you a few more questions over the next couple of days.
I do not want to mess it up, obviously.